Safety-clutch for feed-cutters.



M. A. PAULSON & CTFREDERICKSON.

SAFETY CLUTCH FOR FEED CUTTERS.

APPLICATION FILED'MAR`3. 1915.

1,168,1 10. Patented Jan. l1, 1916.

AIAN.

IN VEA/T035 Ano/Mfrs CQLUMBIA PLANQORAPH CD..\v^sHxNafroN. D. c.

MARTIN A. PAU'LscNnND onnis'rrraiv yiinninfvnnr,' oisou," or'nrcii LAKE, wisconsin.

' i SAFETY-CLUTCH Fon FEED-CUTTERS;

tical-1o. y

Be it known that we,VMARTiN A. PALson.

and `Crnus'irsnv FREDERICKSON, citizens ofthe United .,States, and residentsof Ricey L'ake county of-Barron, and State of Wisconsin, have invented certain new and useful Improvements in Safety-Clutches for, Feed- Cutters, of whichfthefollowing is a specifi-V Our invention Vis fully describedin the following specification, of which the accom-` panying drawings form a part, in which like reference characters refer to like parts in each of the views, and in which Figure 1 is a longitudinal section taken through our invention as applied to a feed cutter, with the parts in cutting position; Fig. 2 is a similar, fragmentary, section thereof with the parts in inoperative position; and Fig. 3 is a section taken on the line 8-3 of Fig. 1.

In the drawings forming a part of this application we have shown a present preferred form of embodiment of our invention, comprising a shaft 4 having a tubular sleeve 5 freely revoluble thereon and also freely rotatable in bearings 6 of any desired type or class.

Keyed on the sleeve 5 is a disk 7 carrying the cutter blades 8 held thereon in any desired manner, by bolts and nuts 9 in the manner illustrated, and we provide a rib 10 on the surface of the disk 7 opposite the blades 8, this rib being arranged concentric with the shaft 4 and being, preferably, of triangular form in cross section, as shown in Figs. 1 and 2.

Keyed on the shaft 4 is a blower disk 11 having a plurality of fans 12 on the periphery thereof of any desired type, said disk 11 being recessed in the positions of the bolts and nuts 9 in order that the disks 7 and 11 may closely approach each other, and the disk 11 is also provided with a channel 13 in the position of the rib 10 on the disk 7, and preferably of the same formation, and into which channel said rib is adapted to enter and be engaged to frictionally hold the disks 7 and 11 in operative engagement.

Specification `of Letters Patent. i Patented Jan, 141, 1916," 4 4appiiiario'n animeren e, 1915. serial No. 11,689.

' The shaft 4 carries a pulley 14 at one end'- thereof whereby it may be rotated to revolve the` fans, thisbeing a constant operationv while the device is in action, and said shaft isprovided with a reduced', screw-threaded, member 15 at its' opposite end and upon which is mounted a nut 16 adaptedv to bear against the outer end of the sleeve 5 and force the sleeve and shaft endwise of each other and thus forcel the .disks `7 and 11 into` frictional engagement.

The screw-thread .on the shaft member 15 isy eitherl right or left hand, according Vto the direction of movement of the shaft `4,beingv left hand the vform Shown where the fan dislcll revolves clock-wise in 3, the" lobjectofwhich is to causek said nut.-v 16 to move outwardly of the main portion of the shaft 4, through its frictio-nal engagement with the end of the sleeve 5, when the revolution of the cutter disk 7 is preventedfor any reason, and thus disengage the frictional engagement of the rib l0 in the chan-l f nel 13 and render the cutter disk 7 inoperative, the disengaged position of the disks being shown in Fig. 2.

In practice, if a hard substance, such as a stone, wrench or other tool, pitch-fork, or other implement, should pass into the path of the cutter blades, the revolution of the cutter disk 7 would be prevented, but the shaft 4 would still be enabled to rotate; this obstruction to the revolution of the cutter disk would cause the nut 16 to unwind on its supporting shaft member 15, and no breakage of the parts of the device could occur, nor would the operator be subjected to the danger of accident. As soon as the operator stops the machine and removes the obstruction, he may again and instantly tighten the nut 16, thereby binding the disks 7 and 11 into frictional engagement, and the normal operation of the device may be resumed, and it will be noted that the nut 16 which renders the cutter blades operative or inoperative is entirely removed from the danger zone of the blades, thus precluding the possibility of accident to the operator. The tendency of all persons having the provision, installation, and maintenance in charge is toward kthe safety of employees, and it will be seen that our invention meets all possible requirements in this respect, Y

cutter, We do not confine ourselves thereto,4

but may adapt the invention to any type of Y cutter, and may maken such structuralY changes over the forni shown as vvillvl be necessary to adapt the invention to other` 1. A device of the class described, toom-K- prising' a shaft, 'a sleeve independently rotatable thereon, supporte therefor, 'a disk` on said sleeve provided with a rib concentric with said shaft, :a disk on said shaft pro-k `vided with a Channel concentric With said shaft and adapted to receive said rib, rand means displaceable by retardation 'of said first named disk for normally holding said disks in frictional Contact to insure 'siniilltaneous revolution thereof.

Q. A device of the class described, Coinprising a shaft, a sleeve independently rotatable thereon, supports therefor, a disk on Copiez of this patent 'may be obtained foi' ve 'cents each; by addressing 'the Yh"minimis'sioifevr.oflateriits,

i sleeve provided airib vConoentric Withs said shaft, a disk on said shaft proshaft adapted .tojreceive said rib, said shaft having a screw-thread thereon in the direction ofshaft rotation, a nut engaged by said screw-thread and bearing` on the correspondl ing` eiidof said sleeve to force said disks into frictional Contact to insure revolution there of as a unit, a retardation of `said first named diskf'holding said hutiinrnoVabl'e/vvith re* speet thereto during# the continued rotation* of `said shaft to unsorew said nut on said:

shaft 'and destroy the frietioilall 'evngage-` HRIS Witnesses: r

WLTER AoiiEizMAN, H; F.Boosr. .l

Washington,

'signed our TIAN FREDERICSON 

